CN102865505B - Backlight module and liquid crystal display device with same - Google Patents
Backlight module and liquid crystal display device with same Download PDFInfo
- Publication number
- CN102865505B CN102865505B CN201210317933.4A CN201210317933A CN102865505B CN 102865505 B CN102865505 B CN 102865505B CN 201210317933 A CN201210317933 A CN 201210317933A CN 102865505 B CN102865505 B CN 102865505B
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- CN
- China
- Prior art keywords
- backlight module
- thermal conductive
- conductive cavity
- light source
- aluminium extruded
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133602—Direct backlight
- G02F1/133604—Direct backlight with lamps
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0081—Mechanical or electrical aspects of the light guide and light source in the lighting device peculiar to the adaptation to planar light guides, e.g. concerning packaging
- G02B6/0085—Means for removing heat created by the light source from the package
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F13/00—Illuminated signs; Luminous advertising
- G09F13/04—Signs, boards or panels, illuminated from behind the insignia
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Nonlinear Science (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Planar Illumination Modules (AREA)
- Liquid Crystal (AREA)
- Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)
Abstract
The invention discloses a backlight module comprising a light source and an aluminum extrusion, wherein the light source is fixed on the aluminum extrusion; the aluminum extrusion comprises at least one heat conducting chamber; and the heat conducting chamber is of a hollow through structure with an opening. The invention also discloses a liquid crystal display device with the backlight module. By implementing the backlight module and the liquid crystal display device with the backlight module provided by the invention, an air circulating channel can be formed inside the heat conducting chamber, so that the heat radiating effect can be enhanced; and the progresses of packaging the light source and an MCPCB (Metal Core Printed Circuit Board) to form a lamp strip and sticking the lamp strip to the aluminum extrusion can be omitted, so that a heat resistance interface is reduced and the assembly material is saved.
Description
Technical field
The present invention relates to field of liquid crystal display, relate in particular to a kind of backlight module and adopt the liquid crystal indicator of this backlight module.
Background technology
Liquid crystal indicator comprises demonstration module, shows that module, in order to show image, all needs to use the light source that provides backlight, and existing backlight is mainly CCFL and LED.LED, as more novel light source, has advantages of high brightness low-power consumption at present, therefore adopt the design of LED-backlit to increase gradually, is also following designs trend; But because LED can produce high heat simultaneously, therefore, for ensureing LED light extraction efficiency and life-span, need carry out heat dissipation design for LED.
Existing radiating mode mainly contains backboard heat radiation and aluminium extruded (aluminum extruded type heat sink section bar) heat radiation, and backboard radiating mode is owing to requiring whole backboard all to adopt aluminium or aluminium matter alloy to make, and cost is higher, does not meet low-cost design requirement, therefore seldom adopt; As shown in Figure 3, aluminium extruded radiating mode refers to: LED7 is packaged in to MCPCB (Metal Core PCB, metal base printed circuit board) and forms LED lamp bar, then LED lamp bar is adhered fixed on aluminium extruded 8 by heat-conducting glue, aluminium extruded 8 is arranged on backboard 9.There is following defect in the backlight module of this structure:
1, need to carry out LED and MCPCB and encapsulate formation lamp bar and lamp bar is sticked to the operation on aluminium extruded 8, expend man-hour and material;
2, structure is numerous and diverse, causes thermal resistance interface to increase, and is unfavorable for heat radiation performance.
Summary of the invention
Technical problem to be solved by this invention is, a kind of backlight module is provided and adopts the liquid crystal indicator of this backlight module, can form in the inside of thermal conductive cavity the passage of circulation of air, improving radiating effect; Can remove light source and MCPCB from and encapsulate formation lamp bar and lamp bar is sticked to the operation on aluminium extruded, reduce thermal resistance interface, save fabricated material.
In order to solve the problems of the technologies described above, embodiments of the invention provide a kind of backlight module, comprise light source and aluminium extruded, described light source is fixed on described aluminium extruded, described aluminium extruded comprises at least one thermal conductive cavity, described thermal conductive cavity is the communicating structure with the hollow of opening, the outer surface spraying heat radiation paint of described thermal conductive cavity or the heat dissipating layer of irradiation heat radiation;
Described aluminium extruded also comprises: the extension plate in order to increase with extraneous air contact area, described extension plate extends and arranges from arbitrary wall of described thermal conductive cavity, described extension plate comprises orthogonal transverse slat and riser is set, the backboard of described transverse slat or riser and described backlight module is spliced into one, the surface spraying heat radiation paint of described extension plate or the heat dissipating layer of irradiation heat radiation;
The cross section of described thermal conductive cavity is square.
Preferably, described light source is fixed on the outer wall of described thermal conductive cavity.
Preferably, the two side ends of described extension plate keeps concordant with two relative openends of described thermal conductive cavity respectively.
The invention also discloses a kind of liquid crystal indicator with above-mentioned back light module unit structure.
Backlight module provided by the present invention and adopt the liquid crystal indicator of this backlight module, backlight module comprises light source and aluminium extruded, aluminium extruded comprises at least one thermal conductive cavity, thermal conductive cavity is the communicating structure with the hollow of opening, light source led is directly encapsulated on the outer wall of thermal conductive cavity, backlight module can form in the inside of thermal conductive cavity the passage of circulation of air, improving radiating effect; Can remove light source and MCPCB from and encapsulate formation lamp bar and lamp bar is sticked to the operation on aluminium extruded, reduce thermal resistance interface, save fabricated material.
Brief description of the drawings
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the broken section structural representation of backlight module embodiment mono-of the present invention;
Fig. 2 is the broken section structural representation of backlight module embodiment bis-of the present invention;
Fig. 3 is the broken section structural representation of backlight module of the prior art.
Detailed description of the invention
Below with reference to accompanying drawing, the preferred embodiments of the present invention are described.
The embodiment of the present invention provides a kind of backlight module, comprising: light source 1 and aluminium extruded 2, and light source 1 is fixed on aluminium extruded 2, and aluminium extruded 2 comprises at least one thermal conductive cavity 21, and thermal conductive cavity 21 is the communicating structures with the hollow of opening.
Backlight module of the present invention, by thermal conductive cavity 21 is set, forms the passage of circulation of air in the inside of thermal conductive cavity 21, increased the mobility of air, makes the heat on aluminium extruded 1 be delivered to rapidly outside by thermal conductive cavity 21; In addition, the hollow structure of thermal conductive cavity 21 also has the effect that increases aluminium extruded 1 and air contact area, is conducive to backlight module and dispels the heat more efficiently.Below there is the structure of explanation backlight module.
Embodiment 1:
Referring to Fig. 1, backlight module has light source 1 and aluminium extruded 2, and light source 1 is fixed on aluminium extruded 2.Aluminium extruded 2 is made up of thermal conductive cavity 21 and extension plate 22.Wherein, thermal conductive cavity 21 is to be formed by four end to end side sidewall enclosings, and cross section is square.The opposite end of thermal conductive cavity 21 arranges opening, and forms the air communication channel that is column of hollow in inside, and light source 1 is directly encapsulated on the outer wall of any one sidewall of thermal conductive cavity 21.
Backlight module of the present invention is in the time implementing, and the heat that light source led produces is transmitted in thermal conductive cavity 21 by the sidewall of thermal conductive cavity 21, and because the opposite end of thermal conductive cavity 21 arranges opening, the air of thermal conductive cavity 21 inside is because being heated density step-down directed flow occurs.Now, just form the passage of circulation of air in the inside of thermal conductive cavity 21, accelerated wherein scattering and disappearing of heat; In this process, four side sidewalls of thermal conductive cavity 21 also synchronously participate in heat conduction, increase the contact area of whole aluminium extruded and extraneous air, realize high efficiency and heat radiation.
By thermal conductive cavity 21 is set, in improving heat radiation efficiency, also because thering is more excellent heat dispersion, can remove light source led 1 from and encapsulate and form LED lamp bar and LED lamp bar is sticked to the operation on aluminium extruded with MCPCB, save fabricated material; Light source led is directly encapsulated on the outer wall of thermal conductive cavity 21, has also reduced thermal resistance interface simultaneously, reaches the object of auxiliary heat dissipation.
Preferably, can be in the outer surface spraying heat radiation paint of thermal conductive cavity 21 or the heat dissipating layer (not shown) of irradiation heat radiation, scattering and disappearing of accelerated heat, reaches better radiating effect.
The effect that in above-described embodiment, thermal conductive cavity 21 is set to cross section square in shape is: in the equal situation of materials'use amount, the be square surface area of aluminium extruded of cross section is greater than the surface area of other cross sectional shape aluminium extrudeds, the area of dissipation of aluminium extruded can be increased, and the intensity of aluminium extruded can be ensured.Certainly, thermal conductive cavity 21 also can be set to the cross section of other shapes, and as circle, common polygon etc., all can reach the above-mentioned effect of heat radiation more efficiently.
Extension plate 22 any wall in four side sidewalls of thermal conductive cavity 21 extends setting, and it is for increasing the contact area of aluminium extruded and extraneous air, and in acceleration thermal conductive cavity 21, heat scatters and disappears.
Preferably, for making extension plate 22 can reach best heat dispersion, can keep the two side ends of extension plate 22 to hold level with both hands together with two relative openings of thermal conductive cavity 21 respectively, or in the surface of the extension plate 22 heat dissipating layer (not shown) that all (or part) spraying heat radiation is painted or irradiation dispels the heat.
Embodiment 2:
Referring to Fig. 2, the present embodiment is that the aluminium extruded that is provided with thermal conductive cavity 21 is applied in to the embodiment in down straight aphototropism mode set, the difference of this embodiment and above-described embodiment 1 is: extension plate 22 includes orthogonal transverse slat and riser are set, light source led be arranged on the outer wall of transverse slat in conplane thermal conductive cavity 21 as shown in the figure on.The transverse slat arranging in this embodiment is except having effect of improving radiating effect, and it can also be as the connector being connected with the backboard of backlight module, and the splicing of the backboard by transverse slat and backlight module, reaches the requirement of low-cost design.
In other embodiments of backlight module of the present invention, thermal conductive cavity can be set to multiple according to actual designing requirement, thermal conductive cavity also can arrange according to actual radiating requirements one or more openend, is the communicating structure with the hollow of opening as long as meet thermal conductive cavity.
The present invention has also opened a kind of liquid crystal indicator, and this liquid crystal indicator comprises the backlight module of one or more above-mentioned enforcement structures, and detailed description of the invention repeats no more.
Implement backlight module of the present invention and adopt the liquid crystal indicator of this backlight module, there is following beneficial effect: backlight module comprises light source and aluminium extruded, aluminium extruded comprises at least one thermal conductive cavity, thermal conductive cavity is the communicating structure with the hollow of opening, light source led is directly encapsulated on the outer wall of thermal conductive cavity, backlight module can form in the inside of thermal conductive cavity the passage of circulation of air, improving radiating effect; Can remove light source and MCPCB from and encapsulate formation lamp bar and lamp bar is sticked to the operation on aluminium extruded, reduce thermal resistance interface, save fabricated material.
Above disclosed is only preferred embodiment of the present invention, certainly can not limit with this interest field of the present invention, and therefore equivalent variations, still belongs to the scope that the present invention is contained.
Claims (4)
1. a backlight module, comprises light source and aluminium extruded, and described light source is fixed on described aluminium extruded, it is characterized in that, described aluminium extruded comprises at least one thermal conductive cavity, and described thermal conductive cavity is the communicating structure with the hollow of opening, the outer surface spraying heat radiation paint of described thermal conductive cavity or the heat dissipating layer of irradiation heat radiation;
Described aluminium extruded also comprises: the extension plate in order to increase with extraneous air contact area, described extension plate extends and arranges from arbitrary wall of described thermal conductive cavity, described extension plate comprises orthogonal transverse slat and riser is set, the backboard of described transverse slat or riser and described backlight module is spliced into one, the surface spraying heat radiation paint of described extension plate or the heat dissipating layer of irradiation heat radiation;
The cross section of described thermal conductive cavity is square.
2. backlight module as claimed in claim 1, is characterized in that, described light source is fixed on the outer wall of described thermal conductive cavity.
3. backlight module as claimed in claim 1, is characterized in that, the two side ends of described extension plate keeps concordant with two relative openends of described thermal conductive cavity respectively.
4. a liquid crystal indicator, is characterized in that, described liquid crystal indicator comprises the backlight module as described in claim 1-3 any one.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210317933.4A CN102865505B (en) | 2012-08-31 | 2012-08-31 | Backlight module and liquid crystal display device with same |
| PCT/CN2012/081080 WO2014032325A1 (en) | 2012-08-31 | 2012-09-06 | Backlight module and liquid crystal display device employing the backlight module |
| US13/643,087 US8858035B2 (en) | 2012-08-31 | 2012-09-06 | Backlight module and liquid crystal display device using same |
| DE112012006359.7T DE112012006359T5 (en) | 2012-08-31 | 2012-09-06 | Backlight module and liquid crystal display device with the backlight module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210317933.4A CN102865505B (en) | 2012-08-31 | 2012-08-31 | Backlight module and liquid crystal display device with same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102865505A CN102865505A (en) | 2013-01-09 |
| CN102865505B true CN102865505B (en) | 2014-10-22 |
Family
ID=47444547
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210317933.4A Active CN102865505B (en) | 2012-08-31 | 2012-08-31 | Backlight module and liquid crystal display device with same |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US8858035B2 (en) |
| CN (1) | CN102865505B (en) |
| DE (1) | DE112012006359T5 (en) |
| WO (1) | WO2014032325A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109270723A (en) * | 2018-10-26 | 2019-01-25 | 蚌埠国显科技有限公司 | A kind of novel liquid crystal display module |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101949526A (en) * | 2010-07-12 | 2011-01-19 | 深圳市华星光电技术有限公司 | Side-entering type backlight module and back-plate heat radiating structure thereof |
| CN102012006A (en) * | 2010-11-23 | 2011-04-13 | 友达光电股份有限公司 | Fixing structure |
| CN201944701U (en) * | 2011-03-09 | 2011-08-24 | 青岛海信电器股份有限公司 | A back light model and a LCD device containing the model |
| CN202082747U (en) * | 2011-05-26 | 2011-12-21 | 深圳市华星光电技术有限公司 | Display device and backlight module |
| CN102563459A (en) * | 2011-12-13 | 2012-07-11 | 深圳市华星光电技术有限公司 | Backlight module and liquid crystal display device |
| CN102588839A (en) * | 2012-02-16 | 2012-07-18 | 深圳市华星光电技术有限公司 | Backlight module and liquid crystal display device adopting same |
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| US7710531B2 (en) * | 2005-02-15 | 2010-05-04 | Denso Corporation | Liquid crystal display apparatus |
| KR100772374B1 (en) * | 2005-03-12 | 2007-11-01 | 삼성전자주식회사 | Edge light type back light unit having heat sink system |
| EP1760392A1 (en) * | 2005-08-29 | 2007-03-07 | Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH | A mounting structure for LED lighting systems |
| KR100516123B1 (en) * | 2005-08-30 | 2005-09-21 | 주식회사 누리플랜 | A line type led illumination lamp |
| JP5092408B2 (en) * | 2007-01-11 | 2012-12-05 | ソニー株式会社 | Backlight device and display device |
| JP2008305713A (en) * | 2007-06-08 | 2008-12-18 | Fujifilm Corp | Surface illumination device |
| CN201188301Y (en) * | 2008-04-29 | 2009-01-28 | 李金传 | LED display module capable of extending arbitrarily |
| KR20100122679A (en) * | 2009-05-13 | 2010-11-23 | 엘지이노텍 주식회사 | Backlight unit and liquid crystal display device using thereof |
| TWI435144B (en) * | 2010-04-12 | 2014-04-21 | Young Lighting Technology Corp | Backlight module |
| WO2011139768A2 (en) * | 2010-04-28 | 2011-11-10 | Cooper Technologies Company | Linear led light module |
| KR101761403B1 (en) * | 2010-07-14 | 2017-07-25 | 엘지디스플레이 주식회사 | Edge type backlight unit and fabricating method thereof |
| US20120127749A1 (en) * | 2010-11-18 | 2012-05-24 | Shenzhen China Star Optoelectronics Technology Co.Ltd | Side-light type backlight module with local heat-dissipation enhancement |
| TWI460495B (en) * | 2011-11-07 | 2014-11-11 | Au Optronics Corp | Display module |
| US20120092873A1 (en) * | 2011-11-20 | 2012-04-19 | Foxsemicon Integrated Technology, Inc. | Led lamp having waterproof structures |
-
2012
- 2012-08-31 CN CN201210317933.4A patent/CN102865505B/en active Active
- 2012-09-06 DE DE112012006359.7T patent/DE112012006359T5/en not_active Ceased
- 2012-09-06 WO PCT/CN2012/081080 patent/WO2014032325A1/en active Application Filing
- 2012-09-06 US US13/643,087 patent/US8858035B2/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101949526A (en) * | 2010-07-12 | 2011-01-19 | 深圳市华星光电技术有限公司 | Side-entering type backlight module and back-plate heat radiating structure thereof |
| CN102012006A (en) * | 2010-11-23 | 2011-04-13 | 友达光电股份有限公司 | Fixing structure |
| CN201944701U (en) * | 2011-03-09 | 2011-08-24 | 青岛海信电器股份有限公司 | A back light model and a LCD device containing the model |
| CN202082747U (en) * | 2011-05-26 | 2011-12-21 | 深圳市华星光电技术有限公司 | Display device and backlight module |
| CN102563459A (en) * | 2011-12-13 | 2012-07-11 | 深圳市华星光电技术有限公司 | Backlight module and liquid crystal display device |
| CN102588839A (en) * | 2012-02-16 | 2012-07-18 | 深圳市华星光电技术有限公司 | Backlight module and liquid crystal display device adopting same |
Also Published As
| Publication number | Publication date |
|---|---|
| DE112012006359T5 (en) | 2015-01-29 |
| US20140063789A1 (en) | 2014-03-06 |
| CN102865505A (en) | 2013-01-09 |
| US8858035B2 (en) | 2014-10-14 |
| WO2014032325A1 (en) | 2014-03-06 |
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| C10 | Entry into substantive examination | ||
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of invention: Backlight module and liquid crystal display device with same Effective date of registration: 20190426 Granted publication date: 20141022 Pledgee: Bank of Beijing Limited by Share Ltd Shenzhen branch Pledgor: Shenzhen Huaxing Optoelectronic Technology Co., Ltd. Registration number: 2019440020032 |
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| PC01 | Cancellation of the registration of the contract for pledge of patent right | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Date of cancellation: 20201016 Granted publication date: 20141022 Pledgee: Bank of Beijing Limited by Share Ltd. Shenzhen branch Pledgor: Shenzhen China Star Optoelectronics Technology Co.,Ltd. Registration number: 2019440020032 |